TrackMatchDeltaR Node1 TrackMatchDeltaR - m_R2 + TrackMatchDeltaR() + ~TrackMatchDeltaR() + match() + deltaR2() Node2 TrackAssociator # mname # mmatched # mrevmatched + Associator() + ~Associator() + clone() + match() + matched() + revmatched() + matched() + revmatched() + clear() + size() Node2->Node1